CN106121915B - Blower hydraulic variable propeller system and method - Google Patents
Blower hydraulic variable propeller system and method Download PDFInfo
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- CN106121915B CN106121915B CN201610772185.7A CN201610772185A CN106121915B CN 106121915 B CN106121915 B CN 106121915B CN 201610772185 A CN201610772185 A CN 201610772185A CN 106121915 B CN106121915 B CN 106121915B
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- 238000000034 method Methods 0.000 title claims abstract description 18
- 230000005540 biological transmission Effects 0.000 claims abstract description 23
- 230000008878 coupling Effects 0.000 claims description 12
- 238000010168 coupling process Methods 0.000 claims description 12
- 238000005859 coupling reaction Methods 0.000 claims description 12
- 230000008859 change Effects 0.000 claims description 9
- 239000002828 fuel tank Substances 0.000 claims description 8
- 239000012530 fluid Substances 0.000 claims description 6
- 239000002699 waste material Substances 0.000 abstract description 7
- 230000009471 action Effects 0.000 description 5
- 230000002159 abnormal effect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 240000002853 Nelumbo nucifera Species 0.000 description 1
- 235000006508 Nelumbo nucifera Nutrition 0.000 description 1
- 235000006510 Nelumbo pentapetala Nutrition 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000002457 bidirectional effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
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- 235000013399 edible fruits Nutrition 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000035772 mutation Effects 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D7/00—Controlling wind motors
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
- F05B2270/00—Control
- F05B2270/30—Control parameters, e.g. input parameters
- F05B2270/32—Wind speeds
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
- F05B2270/00—Control
- F05B2270/30—Control parameters, e.g. input parameters
- F05B2270/328—Blade pitch angle
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
- F05B2270/00—Control
- F05B2270/50—Control logic embodiment by
- F05B2270/506—Control logic embodiment by hydraulic means, e.g. hydraulic valves within a hydraulic circuit
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
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- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Wind Motors (AREA)
Abstract
The invention discloses a kind of blower hydraulic variable propeller system and methods, and the system comprises each transmission devices that each blade with blower is correspondingly connected with；It further include the hydraulic system being connected by power with each transmission device, and the consistent limiting component of number with the blade；The pressure of the hydraulic system is steady state value, so that the blade realizes real-time variable pitch by the equilibrium tendency of current wind load and the pressure of the hydraulic system；The steady state value is unit under full hair wind speed, and the blade is maintained at the wind load being subject to when maximum wind area position；The extreme position that the limiting component can limit the blade rotation is the maximum wind area position.The blower hydraulic variable propeller system can make blade adapt to the real-time variable pitch of wind regime automatically, and power loss wind energy wastes when becoming smaller to avoid wind speed, while parts damages and unit failure when wind speed can also be prevented excessive.
Description
Technical field
The present invention relates to technical field of wind power generation, more particularly to a kind of blower hydraulic variable propeller system and method.
Background technique
The pitch-controlled system of wind power generating set is passive type variable pitch at present, and wind measuring system is needed to monitor in a period
Mean wind speed or monitoring wheel speed, completely send out wind speed or wheel speed less than or equal to unit when mean wind speed is less than or equal to unit
When completely sending out when wheel speed, turbines vane is in maximum wind area position, completely sends out when the mean wind speed monitored is greater than unit
When wind speed or wheel speed are greater than wheel speed when unit is completely sent out, feeding back to pitch-controlled system by the master control of blower keeps blade passive
Variable pitch can have following problems at this point, vane propeller-changing has hysteresis quality:
Initial wind speed is smaller (be less than and completely send out wind speed), and blade is in maximum wind area position, in wind measuring system monitoring
In one period, if wind speed becomes larger (be more than or equal to completely send out wind speed), because wind measuring system does not feed back and becomes blade at this time
Paddle, so the wind load that time period intra vane is subject to can become larger, generator will appear phenomenon of overrunning, to make blade and dependent part
Part leads to parts damages and unit failure by wind speed mutation and by abnormal load.
Initial wind speed is larger (be more than or equal to and completely send out wind speed), and blade is in the smaller position of wind area, supervises in wind measuring system
In the period surveyed, if wind speed becomes smaller (be less than completely send out wind speed), because wind measuring system does not feed back and becomes blade at this time
Paddle, so the wind load that time period intra vane is subject to can become smaller, while the wind speed of generated energy relatively at that time can be smaller, damages power
Going wrong can waste.
In view of this, how to improve the pitch-controlled system of existing blower, the blade of blower is set to adapt to wind regime automatically real-time
Variable pitch, power loss wind energy wastes when becoming smaller to avoid wind speed, at the same when wind speed can also be prevented excessive parts damages and unit therefore
Barrier, is a technical problem that technical personnel in the field need to solve at present.
Summary of the invention
The object of the present invention is to provide a kind of blower hydraulic variable propeller system and method, the blower hydraulic variable propeller system and method
Blade can be made to adapt to the real-time variable pitch of wind regime automatically, power loss wind energy wastes when becoming smaller to avoid wind speed, while can also prevent
Parts damages and unit failure when wind speed is excessive.
In order to solve the above technical problems, the present invention provides a kind of blower hydraulic variable propeller system, including each blade with blower
Each transmission device being correspondingly connected with；Further include the hydraulic system being connected by power with each transmission device, and with the blade
The consistent limiting component of number；The pressure of the hydraulic system is steady state value, so that the blade passes through current wind load and institute
The equilibrium tendency for stating the pressure of hydraulic system realizes real-time variable pitch；
The steady state value is unit under full hair wind speed, and the blade is maintained at the wind being subject to when maximum wind area position
It carries；The extreme position that the limiting component can limit the blade rotation is the maximum wind area position.
As above, blade is connected by power by transmission device and hydraulic system, and the pressure of the hydraulic system is steady state value, the perseverance
Definite value makes unit under full hair wind speed, and blade is maintained at maximum wind area position, and the corresponding position is provided with limit
Component, to limit the extreme position of blade rotation；That is, hydraulic system is conducted to the power of blade, with unit in Man Fafeng
When fast, blade is in the dynamic balance being subject to when maximum wind area position, in this way, when wind speed variation, wind load that blade is subject to
Change therewith, and to conduct the power to blade invariable for hydraulic system, under the action of the two difference, blade can from trend by
The direction that wind area is small or wind area is big rotates variable pitch, thus realize that blade adapts to the real-time variable pitch of wind regime automatically, it is specific as follows:
Initial wind speed is smaller (be less than and completely send out wind speed), and blade is in maximum wind area position, (is greater than full when wind speed becomes larger
Send out wind speed), the wind load that blade is subject to becomes larger, and conducts greater than hydraulic system to the power of blade, blade overcomes the hydraulic of hydraulic system
Direction variable pitch that can be small to wind area, since blade rotates variable pitch according to the difference of wind load and hydraulic coupling, so can from
Dynamic to adapt to wind regime variable pitch, fast response time can be avoided in the prior art because wind load becomes larger blade and associated components by abnormal load
Parts damages caused by lotus and unit failure；
Initial wind speed is larger (be greater than and completely send out wind speed), and blade is in the smaller position of wind area, (is less than full when wind speed becomes smaller
Send out wind speed), the wind load that blade is subject to becomes smaller, and conducts less than hydraulic system to the power of blade, the hydraulic energy transfer of hydraulic system is
Mechanical energy output, and make blade to variable pitch at maximum wind area by transmission device, blade turns at maximum wind area
Stop under the position-limiting action of limiting component afterwards, to avoid the waste of wind energy；
Therefore blower hydraulic variable propeller system provided by the invention can make blade adapt to the real-time variable pitch of wind regime automatically,
Power loss wind energy wastes when becoming smaller to avoid wind speed, while parts damages and unit failure when wind speed can also be prevented excessive.
Optionally, the hydraulic system include with the consistent two-way hydraulic motor of transmission device number, it is each described double
It is connected to the power output end of hydraulic motor with the corresponding transmission device；Two hydraulic fluid ports of the two-way hydraulic motor are distinguished
It is connected to system pressure oil circuit and oil return circuit.
Optionally, the hydraulic system further includes the hydraulic pump of each two-way hydraulic motor work of driving, described hydraulic
The oil outlet of pump also passes through the first overflow valve and is connected to fuel tank.
Optionally, the hydraulic system further includes reversal valve, and the reversal valve is for controlling the two-way hydraulic motor
Two hydraulic fluid ports are connected to the system pressure oil circuit or the oil return circuit respectively.
Optionally, the second overflow valve is additionally provided between the oil return circuit and the fuel tank.
Optionally, the hydraulic pump is variable pump.
Optionally, the transmission device includes the pitch variable bearings connecting with the blade and connect with the pitch variable bearings
Driving member, the driving member are connect with the power output end of the two-way hydraulic motor.
Optionally, the driving member is connect by two-way retarder with the power output end of the two-way hydraulic motor.
Optionally, the driving member is toothed belt or gear.
The present invention also provides a kind of blower hydraulic vane change methods, which comprises the blade of fan provides a perseverance
Determine hydraulic coupling, the size of the constant hydraulic coupling is unit under full hair wind speed, and the blade is at maximum wind area position
The wind load size being subject to；The blade is according to the real-time variable pitch of equilibrium tendency of current wind load and the constant hydraulic coupling, wherein institute
The extreme position for stating blade rotation is the maximum wind area position.
It is consistent with the principle of above-mentioned blower hydraulic variable propeller system, blower hydraulic vane change method technology effect having the same
Fruit, which is not described herein again.
Detailed description of the invention
Fig. 1 is a kind of structural block diagram of specific embodiment of blower hydraulic variable propeller system provided by the present invention；
Fig. 2 is the schematic illustration of hydraulic system in Fig. 1；
Fig. 3 shows the connection structure signal of the two-way hydraulic motor and transmission device of hydraulic system in specific embodiment
Figure；
Fig. 4 is a kind of flow chart of specific embodiment of blower hydraulic vane change method provided by the present invention.
In figure:
Hydraulic system 10, two-way hydraulic motor 11, hydraulic pump 12, the first overflow valve 13, the second overflow valve 14, reversal valve
15, fuel tank 16；
Transmission device 20, two-way retarder 21, driving member 22, pitch variable bearings 23；
Blade 30.
Specific embodiment
In order to enable those skilled in the art to better understand the solution of the present invention, with reference to the accompanying drawings and detailed description
The present invention is described in further detail.
Referring to FIG. 1, Fig. 1 is a kind of structural block diagram of specific embodiment of blower hydraulic variable propeller system provided by the present invention.
For variable pitch type blower, each blade has relatively independent pitch drive system.
The blower hydraulic variable propeller system that the embodiment provides, each transmission dress being correspondingly connected with including each blade 30 with blower
Set 20；It further include the hydraulic system 10 being connected by power with each transmission device 20, and the consistent limiting section of number with blade 30
Part；The pressure of hydraulic system 10 is steady state value, so that blade 30 is become by the balance of current wind load and the pressure of hydraulic system 10
Gesture realizes real-time variable pitch；The steady state value is unit under full hair wind speed, when blade 30 is maintained at maximum wind area position by
Wind load；Limiting component can limit the extreme position of the rotation of blade 30 as maximum wind area position.
As above, in the program, blade 30 is connected by power by transmission device 20 with hydraulic system 10, the hydraulic system 10
Pressure is steady state value, which makes unit under full hair wind speed, and blade 30 is maintained at maximum wind area position, and should
Corresponding position is provided with limiting component, to limit the extreme position of the rotation of blade 30；That is, hydraulic system 10 is conducted to leaf
The power of piece 30, with unit in full hair wind speed, blade 30 is in the dynamic balance being subject to when maximum wind area position, in this way, working as
When wind speed changes, the wind load that blade 30 is subject to changes therewith, and the power of hydraulic system 10 conduction to blade 30 is invariable, two
Under the action of person's difference, blade 30 can rotate variable pitch from the direction that trend wind area is small or wind area is big, to realize
Blade 30 adapts to the real-time variable pitch of wind regime automatically, specific as follows:
Initial wind speed is smaller (be less than and completely send out wind speed), and blade 30 is in maximum wind area position, (is greater than when wind speed becomes larger
Completely send out wind speed), the wind load that blade 30 is subject to becomes larger, and greater than the conduction of hydraulic system 10 to the power of blade 30, blade 30 overcomes hydraulic
The hydraulic energy of the system 10 direction variable pitch small to wind area, since blade 30 rotates change according to the difference of wind load and hydraulic coupling
Paddle, so wind regime variable pitch can be adapted to automatically, fast response time be can be avoided in the prior art because wind load becomes larger blade 30 and phase
Close component parts damages caused by by abnormal load and unit failure；
Initial wind speed is larger (be greater than and completely send out wind speed), and blade 30 is in the smaller position of wind area, (is less than when wind speed becomes smaller
Completely send out wind speed), the wind load that blade 30 is subject to becomes smaller, the power less than the conduction of hydraulic system 10 to blade 30, the liquid of hydraulic system 10
Pressure energy is converted into mechanical energy output, and makes blade 30 to variable pitch at maximum wind area by transmission device 20, and blade 30 rotates
Stop under the position-limiting action of limiting component after to maximum wind area, to avoid the waste of wind energy.
It is the schematic illustration of hydraulic system in Fig. 1 please also refer to Fig. 2 and Fig. 3, Fig. 2；Fig. 3 shows specific embodiment
The two-way hydraulic motor of middle hydraulic system and the attachment structure schematic diagram of transmission device.
For ease of description, hereafter carrying out exemplary illustration there are three blade 30 with blower tool, it will be understood that the blade 30 of blower
Number may be other, and 30 number of blade does not constitute a limitation the protection scope of the application.
The hydraulic system 10 includes three two-way hydraulic motors 11, the power output end of each hydraulic motor 11 and corresponding biography
Dynamic device 20 connects, and two hydraulic fluid ports of two-way hydraulic motor 11 are connected to system pressure oil circuit and oil return circuit respectively.
By the hydraulic energy transfer of hydraulic system 10 it is mechanical energy by two-way hydraulic motor 11, and is passed by transmission device 20
It is directed at blade 30.
In specific scheme, hydraulic motor 11 is driven by hydraulic pump 12, in scheme shown in Fig. 2, three hydraulic motors 11
It is driven by the same hydraulic pump 12, to simplify the structure of hydraulic system 10.
The oil inlet of hydraulic pump 12 is connected to fuel tank 16, oil outlet and system pressure oil communication.
Specifically, hydraulic pump 12 can preferentially select variable pump, so that liquid when hydraulic system 10 keeps 30 position of blade constant
10 flow of pressure system is minimum, and pressure is constant, to reduce power consumption.
Specifically, in order to keep the pressure of system pressure oil circuit constant, can be arranged and fuel tank 16 in the oil outlet of hydraulic pump 12
First overflow valve 13 of connection adjusts the pressure of hydraulic system 10 by the set pressure of the first overflow valve 13, and makes its holding
It is constant.
The second overflow valve 14 can also be set simultaneously between oil return circuit and fuel tank 16, pass through the first overflow valve 13 and second
The matching of overflow valve 14 is arranged, and hydraulic system 10 is made to maintain constant pressure.
In specific scheme, transmission device 20 includes the pitch variable bearings 23 connecting with blade 30 and connect with pitch variable bearings 23
Driving member 22, wherein driving member 22 is connect with the power output end of two-way hydraulic motor 11.
Wherein, driving member 22 is connect by two-way deceleration with the power output end of hydraulic motor 11, two-way retarder 21
Setting can match revolving speed, transmit torque.
Specifically, driving member 22 can be the structure type of toothed belt or the structure type of gear.Correspondingly, driving member 22
Connection structure between two-way retarder 21 can adjust according to the concrete form of driving member 22.
Illustrate the course of work of the blower hydraulic variable propeller system with concrete application below.
Assuming that it is that unit completely sends out wind speed that wind speed, which is 10m/s, when wind speed is 10m/s, blade 30 is in maximum wind area
Place, unit are completely sent out, and correspondingly, the constant pressure of hydraulic system 10 makes the conduction of hydraulic system 10 to the power and leaf at this time of blade 30
The wind load balance that piece 30 is subject to.
When wind speed variation is 15m/s, it is greater than and completely sends out wind speed, when the wind load that blade 30 is subject to is greater than completely sending out, hydraulic system
10 are conducted by two-way retarder 21, driving member 22 and pitch variable bearings 23 to the power of blade 30, and blade 30 is forced through change at this time
Paddle shaft, which holds 23 conduction, will drive the output end rotation of driving member 22 to driving member 22, while hydraulic system 10 is by system pressure oil
13 overflow of the first overflow valve of road, the direction variable pitch small to wind area of blade 30, when blade 30 is adaptively put away the oars certain angle,
After the wind load being subject to blade 30 is equal with the power of hydraulic system 10 conduction to blade 30, hydraulic system 10 stops overflow, unit
It is still within full state, 10 pressure of hydraulic system remains unchanged during this.
When wind speed variation is 5m/s, and the wind load that blade 30 is subject to is less than completely hair, hydraulic system 10 passes through two-way retarder
21, driving member 22 and the conduction of pitch variable bearings 23 to blade 30 power, because the system pressure of hydraulic system 10 at this time is constant, by double
Two-way retarder 21 is driven to hydraulic motor 11, and output torque is greater than the power that driving member 22 draws blade 30, so that blade 30 can be with
Variable pitch, until stopping after being limited component limit when blade 30 is in maximum wind area position.
As above, which passes through 10 pressure of hydraulic system and blade 30 by the equilibrium tendency of wind load, in fact
Existing blade 30 adapts to the real-time variable pitch of wind regime automatically.
In addition, reversal valve 15, the commutation can also be arranged between the system pressure oil circuit and oil return circuit of hydraulic system 10
Two hydraulic fluid ports that valve 15 is used to control hydraulic motor 11 are connected to system pressure oil circuit or oil return circuit, the setting of the reversal valve 15
It can be convenient service personnel to overhaul unit.
With shown in Fig. 2, when blower works normally, reversal valve 15 is maintained at left position, the first actuator port A and bidirectional hydraulic
The left oil port of motor 11 is connected to, and the second actuator port B is connected to the right oil port of two-way hydraulic motor 11.
In specific scheme, limiting component be can be set on pitch variable bearings 23, naturally it is also possible to it is arranged in other positions,
As long as the extreme position that blade 30 rotates can be limited to maximum wind area position, limiting component is specifically as follows limit
Position block.
Other than above-mentioned blower hydraulic variable propeller system, the present invention also provides a kind of blower hydraulic vane change methods.
Referring to FIG. 4, Fig. 4 is a kind of flow chart of specific embodiment of blower hydraulic vane change method provided by the present invention；
This method includes that a constant hydraulic coupling is provided to the blade of blower, and the size of the constant hydraulic coupling is unit in full hair wind speed
Under, wind load size that blade is subject at maximum wind area position, that is to say, that when unit is under full hair wind speed, blade exists
Under the balanced action of wind load and constant hydraulic coupling, it is able to maintain in maximum wind area position；Blade is according to current wind load and perseverance
Determine the real-time variable pitch of equilibrium tendency of hydraulic coupling, wherein the extreme position of blade rotation is maximum wind area position.
Specifically, aforementioned hydraulic system can be used to provide in the offer of constant hydraulic coupling；The extreme position of blade rotation can
It is realized by the way that aforementioned limiting component is arranged.
Consistent with the principle of aforementioned blower hydraulic variable propeller system, this method can also reach same technical effect, here not
It repeats again.
Blower hydraulic variable propeller system provided by the present invention and method are described in detail above.It is used herein
A specific example illustrates the principle and implementation of the invention, and the above embodiments are only used to help understand
Method and its core concept of the invention.It should be pointed out that for those skilled in the art, not departing from this
, can be with several improvements and modifications are made to the present invention under the premise of inventive principle, these improvement and modification also fall into the present invention
In scope of protection of the claims.
Claims (10)
1. blower hydraulic variable propeller system, each transmission device (20) being correspondingly connected with including each blade (30) with blower；Its feature
It is, further includes the hydraulic system (10) being connected by power with each transmission device (20), and the number with the blade (30)
The consistent limiting component of mesh；The pressure of the hydraulic system (10) is steady state value, so that the blade (30) passes through current wind load
Real-time variable pitch is realized with the equilibrium tendency of the pressure of the hydraulic system (10)；
The steady state value is unit under full hair wind speed, and the blade (30) is maintained at the wind being subject to when maximum wind area position
It carries；The extreme position that the limiting component can limit the blade (30) rotation is the maximum wind area position.
2. blower hydraulic variable propeller system according to claim 1, which is characterized in that the hydraulic system (10) includes and institute
State the consistent two-way hydraulic motor of transmission device (20) number (11), the power output end of each two-way hydraulic motor (11) with
The corresponding transmission device (20) connection；Two hydraulic fluid ports of the two-way hydraulic motor (11) respectively with system pressure oil circuit and
Oil return circuit connection.
3. blower hydraulic variable propeller system according to claim 2, which is characterized in that the hydraulic system (10) further includes driving
The hydraulic pump (12) of each two-way hydraulic motor (11) work is moved, the oil outlet of the hydraulic pump (12) also passes through the first overflow
Valve (13) is connected to fuel tank (16).
4. blower hydraulic variable propeller system according to claim 3, which is characterized in that the hydraulic system (10) further includes changing
To valve (15), the reversal valve (15) be used to control two hydraulic fluid ports of the two-way hydraulic motor (11) respectively with the system pressure
Power oil circuit or oil return circuit connection.
5. blower hydraulic variable propeller system according to claim 3, which is characterized in that the oil return circuit and the fuel tank
(16) the second overflow valve (14) are additionally provided between.
6. blower hydraulic variable propeller system according to claim 3, which is characterized in that the hydraulic pump (12) is variable pump.
7. according to the described in any item blower hydraulic variable propeller systems of claim 2-6, which is characterized in that the transmission device (20)
It is described including the pitch variable bearings (23) being connect with the blade (30) and the driving member (22) being connect with the pitch variable bearings (23)
Driving member (22) is connect with the power output end of the two-way hydraulic motor (11).
8. blower hydraulic variable propeller system according to claim 7, which is characterized in that the driving member (22) is subtracted by two-way
Fast device (21) connect with the power output end of the two-way hydraulic motor (11).
9. blower hydraulic variable propeller system according to claim 7, which is characterized in that the driving member (22) be toothed belt or
Gear.
10. blower hydraulic vane change method, which is characterized in that the described method includes: the blade offer one of fan is constant hydraulic
Power, the size of the constant hydraulic coupling are unit under full hair wind speed, what the blade was subject at maximum wind area position
Wind load size；The blade is according to the real-time variable pitch of equilibrium tendency of current wind load and the constant hydraulic coupling, wherein the blade
The extreme position of rotation is the maximum wind area position.
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| CN201610772185.7A CN106121915B (en) | 2016-08-30 | 2016-08-30 | Blower hydraulic variable propeller system and method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610772185.7A CN106121915B (en) | 2016-08-30 | 2016-08-30 | Blower hydraulic variable propeller system and method |
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| CN106121915B true CN106121915B (en) | 2019-05-03 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107989744A (en) * | 2017-12-29 | 2018-05-04 | 华润电力风能（阳江）有限公司 | A kind of variable pitch cylinder system |
| CN109185056B (en) * | 2018-10-30 | 2020-03-17 | 新疆金风科技股份有限公司 | Variable pitch driving device, variable pitch driving system and wind generating set |
| CN109441724B (en) * | 2018-12-26 | 2020-02-11 | 北京金风科创风电设备有限公司 | Safety throttling device and method for hydraulic pitch control system and hydraulic pitch control system |
| CN113027677B (en) * | 2019-12-25 | 2023-02-28 | 新疆金风科技股份有限公司 | Hydraulic variable pitch control method and device of wind generating set |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1752439A (en) * | 2005-10-31 | 2006-03-29 | 朱汪逸 | Hydraulic vane change device for wind-driven generator |
| JP2012193642A (en) * | 2011-03-15 | 2012-10-11 | Mitsubishi Heavy Ind Ltd | Wind power generation apparatus |
| CN102506010B (en) * | 2011-12-15 | 2014-01-15 | 三一电气有限责任公司 | Wind driven generator and variable-pitch system thereof |
| CN104481940A (en) * | 2014-12-09 | 2015-04-01 | 天津金诺鼎液压科技有限公司 | Hydraulic yawing brake system of wind driven generator |
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